syzkaller login: [ 29.689393] BUG: Bad rss-counter state mm:00000000dfd2c1c7 type:MM_FILEPAGES val:33 [ 29.691066] BUG: Bad rss-counter state mm:00000000dfd2c1c7 type:MM_ANONPAGES val:22 [ 29.851441] ================================================================== [ 29.852368] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.853295] Read of size 8 at addr ffff88800eace228 by task sshd/220 [ 29.854191] [ 29.854427] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.855282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.856248] Call Trace: [ 29.856583] [ 29.856867] dump_stack_lvl+0x91/0xf0 [ 29.857355] print_report+0xcc/0x620 [ 29.857831] ? __virt_addr_valid+0x102/0x340 [ 29.858382] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.858992] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.859602] kasan_report+0xbe/0xf0 [ 29.860072] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.860693] vma_interval_tree_remove+0xc75/0xec0 [ 29.861295] vma_prepare+0xc54/0x11a0 [ 29.861764] __split_vma+0x5af/0x950 [ 29.862258] ? __pfx___split_vma+0x10/0x10 [ 29.862786] ? find_held_lock+0x2c/0x110 [ 29.863307] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.863870] ? lock_is_held_type+0x9f/0x120 [ 29.864400] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.864998] ? mtree_range_walk+0x632/0x900 [ 29.865556] ? mas_walk+0x5c7/0x7c0 [ 29.866031] do_vmi_munmap+0x1f1/0x2b0 [ 29.866527] mmap_region+0x1f9/0x2660 [ 29.867005] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.867513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.868223] ? __pfx_lock_acquire+0x10/0x10 [ 29.868748] ? __pfx_mmap_region+0x10/0x10 [ 29.869274] ? security_mmap_addr+0x7d/0xa0 [ 29.869799] ? get_unmapped_area+0x1f5/0x3f0 [ 29.870360] do_mmap+0x854/0xf00 [ 29.870796] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.871298] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.871849] ksys_mmap_pgoff+0x3af/0x500 [ 29.872348] do_syscall_64+0x3f/0x90 [ 29.872826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.873469] RIP: 0033:0x7f4b56eccd82 [ 29.873923] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 29.876051] RSP: 002b:00007ffd129ad008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.876947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4b56eccd82 [ 29.877781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4b56306000 [ 29.878636] RBP: 00007f4b56306000 R08: 0000000000000009 R09: 0000000000001000 [ 29.879476] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fcc42c2ec0 [ 29.880317] R13: 00007ffd129ad020 R14: 00007ffd129ad050 R15: 00007ffd129ad3b0 [ 29.881174] [ 29.881464] [ 29.881676] Allocated by task 213: [ 29.882112] kasan_save_stack+0x22/0x50 [ 29.882609] kasan_set_track+0x25/0x30 [ 29.883102] __kasan_slab_alloc+0x59/0x70 [ 29.883625] kmem_cache_alloc+0x16b/0x370 [ 29.884147] vm_area_dup+0x20/0x160 [ 29.884593] __split_vma+0x170/0x950 [ 29.885054] split_vma+0xc6/0x110 [ 29.885488] mprotect_fixup+0x8d2/0xb30 [ 29.885984] do_mprotect_pkey+0x87e/0xd40 [ 29.886509] __x64_sys_mprotect+0x78/0xc0 [ 29.887029] do_syscall_64+0x3f/0x90 [ 29.887498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.888139] [ 29.888350] Freed by task 213: [ 29.888735] kasan_save_stack+0x22/0x50 [ 29.889228] kasan_set_track+0x25/0x30 [ 29.889718] kasan_save_free_info+0x2b/0x50 [ 29.890258] __kasan_slab_free+0x10a/0x190 [ 29.890785] kmem_cache_free+0x10d/0x4d0 [ 29.891288] rcu_core+0x8c8/0x2860 [ 29.891724] __do_softirq+0x1b7/0x7d4 [ 29.892193] [ 29.892404] Last potentially related work creation: [ 29.892981] kasan_save_stack+0x22/0x50 [ 29.893484] __kasan_record_aux_stack+0x8e/0xa0 [ 29.894073] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.894721] remove_vma+0x139/0x170 [ 29.895174] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.895781] do_vmi_munmap+0x1f1/0x2b0 [ 29.896259] __vm_munmap+0x138/0x3a0 [ 29.896722] __x64_sys_munmap+0x59/0x80 [ 29.897216] do_syscall_64+0x3f/0x90 [ 29.897684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.898344] [ 29.898554] Second to last potentially related work creation: [ 29.899243] kasan_save_stack+0x22/0x50 [ 29.899741] __kasan_record_aux_stack+0x8e/0xa0 [ 29.900304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.900936] remove_vma+0x139/0x170 [ 29.901385] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.901937] do_vmi_munmap+0x1f1/0x2b0 [ 29.902432] mmap_region+0x1f9/0x2660 [ 29.902907] do_mmap+0x854/0xf00 [ 29.903334] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.903812] ksys_mmap_pgoff+0x3af/0x500 [ 29.904314] do_syscall_64+0x3f/0x90 [ 29.904782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.905420] [ 29.905632] The buggy address belongs to the object at ffff88800eace1d0 [ 29.905632] which belongs to the cache vm_area_struct of size 168 [ 29.907088] The buggy address is located 88 bytes inside of [ 29.907088] freed 168-byte region [ffff88800eace1d0, ffff88800eace278) [ 29.908473] [ 29.908685] The buggy address belongs to the physical page: [ 29.909336] page:00000000354754e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeace [ 29.910418] memcg:ffff88800e15a801 [ 29.910838] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.911472] page_type: 0xffffffff() [ 29.911929] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 29.912832] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e15a801 [ 29.913724] page dumped because: kasan: bad access detected [ 29.914378] [ 29.914593] Memory state around the buggy address: [ 29.915165] ffff88800eace100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.916001] ffff88800eace180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.916836] >ffff88800eace200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.917668] ^ [ 29.918232] ffff88800eace280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 29.919082] ffff88800eace300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 29.919917] ================================================================== [ 29.920875] Disabling lock debugging due to kernel taint [ 31.936604] BUG: Bad rss-counter state mm:000000004dd87752 type:MM_FILEPAGES val:33 [ 31.937784] BUG: Bad rss-counter state mm:000000004dd87752 type:MM_ANONPAGES val:22 [ 32.348144] BUG: Bad rss-counter state mm:000000008dd7fd86 type:MM_FILEPAGES val:33 [ 32.349426] BUG: Bad rss-counter state mm:000000008dd7fd86 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32293' (ECDSA) to the list of known hosts. 2023/06/20 13:30:00 fuzzer started 2023/06/20 13:30:00 dialing manager at localhost:36067 2023/06/20 13:30:00 checking machine... 2023/06/20 13:30:00 checking revisions... [ 33.095415] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:30:01 testing simple program... [ 33.217343] cgroup: Unknown subsys name 'net' [ 33.273470] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:30:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007efdc1344650 CR3=000000000cbb8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2030303a30333a3331203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a30333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001a11369 RBX=ffff88800d089b18 RCX=1ffff11002066590 RDX=dffffc0000000000 RSI=ffff88800d5e30d0 RDI=ffff88800d089b48 RBP=ffff888010332c50 RSP=ffff8880146bfa28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800d5e2f00 R13=0000000000000000 R14=ffff88801c97caf8 R15=ffff88801c97cab0 RIP=ffffffff8184767e RFL=00000046 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdc0d8f900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007efdc13470b0 CR3=000000000d8f2000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000